#include <iostream>

using std::cout;
using std::endl;

int main(){
    int a = 1;
    cout<< a++ <<"\t"<<a<<endl;          // 1 2

    // c++11 循环
    int num[5] = {1,2,3,4,5};
    for(int &x: num){
        cout<<x<<"\t";
    }
    
    return 0;
}